Annunciator for explosive-engines.



R. G. DEWEY.

ANNUNGIATOR FOR EXPLOSIVE ENGINES.

APPLIOATION FILED APB.1,1908.

Patented Apr. 11, 1911.

WITNESSES:

W 6 A w UNITED STATEplLIENT OFFICE.

RODNEY c. nnwnr, or HOYTVILLE, oruo'.

ANNUNCIATOR FOR EXPLOSIVE-EI JGINES.

Specification of Letters Patent. Patented Apr. 11, 1911.

Application filed April 1, 1968. Serial No. 424,527.

To all whom itmay concern:

Be it known that I, RODNEY C. Dewar, a citizen of the United States, residing at Hoytville, inthe county of Wood and State of Ohio, have invented certain new and useful Improvements in Annunciators for Explosive-Engines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it apper tains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

In operating multiple cylinder explosive engines, especially in automobile practice, a familiar trouble encountered when one or more of the cylinders misses fire is the difficulty of ascertaining which of the cylinders requires attention.

My invention is designed to obviate this objection, and, more particularly, to provide an indicator which, whenever desired, will instantly show which, if any, of the cylinders is not firing properly.

My invention is also designed to utilize the priming cups and relief-cocks as part of my device, thus avoiding multiplicity of parts and their attendant objections.

I attain these objects by means of the devices and arrangement of parts hereinafter described and shown, and illustrated in the accompanying drawings, in which,-

- Figure 1 is a central vertical sectional elevation of a priming cup and relief-valve provided with the make-and-break mechanism,hereinafter referred to,-which accompanies my indicator; Fig. 2, a like sectional elevation of the same taken at a right angle to the point of view in Fig. 1, Fig. 3, a diagrammatic view of m device as applied to a, 3-cylinder explosive engine.

Like numerals of reference indicate correspondingparts throughout the'drawings.

Inthe drawings, 1 is a priming-cup having a threaded hollow stem adapted to be screwed into a hole tapped through into the explosion chamber of an explosion engine 2. In the stem of and immediately below the 'cup is a two-way cook or valve 3 one of its passages 4 being adapted to connect the cavity of the pruning-cup with the explosion-chamber of the engine, as illustrated in Fig. 2, and serving also as a relief-valve for use in starting the engine, as will be understood without fu'rther explanation. The other passage 5 of the cock or valve is designed and adapted to place in communication the explosion-chamber of the engine and the bottom of a hollow cylinder 6 secured to or formed integral with the cup and projecting upwardly from the center of the bottom of the cup. The ports 4 and 5 are in such relation to each other that less than a quarter turn of the cock will serve to throw ,eitlfer of the ports into operative position. In tile bore of the cylinder dis a plunger 7 held normally seated upon the bottom of the bore by a spring 8 one end of which presses upon the top of the plunger, the other end of the spring being secured, as at 9, to a lug 10 formed upon the margin of the cup 1. Immediately above and in the path of the free end of the spring 8 is a con tact piece 11 carried by a bracket 12 secured, as at 13, to a lug formed upon the margin of the cup 1. The contact-piece 11 is suitably insu ated from the bracket by insulatingsleeve 14. The bolts and nuts which secure the parts 8 and 11 in place also serve as binding posts for branch-wires 15 connected with the line 15 and branch-wires 16 connected with line 16 these lines being connected with opposite poles of battery 17. This battery may consist of a single dry cell, which is foundsufiicient for the purpose, or the terminals may be connected with one of the cells of the battery provided for the sparking apparatus. In one of the branchwires isa small incandescent electric lamp 18. The circuit is provided with a switch 19 by which the lamp may be thrown into or out of circuit.

Thus farI have described a single makeand-break device connected with the battery and having a lamp adapted to be thrown into circuit, but it' should beunderstood that each cylinder is provided with one of-the apparatuses illustrated in Figs. 1 and 2 and that there is a lamp 18"f6r each cylinder, each connected by its wires 15-16 with the battery. It shoiild also be understood thatthe lamps are very small and that the series are assembled slde by slde 1n a frame or upon a base,as 1n an annunclator,

where they may be readily seen", foi' in-- ator, by means of which all the cooks may 7 Correction in Letters Patent No. 989,132.

be 0 erated simultaneously and by means Inch all the cocks may be simultane:v ously thrown into either of the posltions illustrated in Figs. 1 and 2, or into closed position. I

The operation of my device 1s as follows: The switch 19 being 0 o 3' being placed, as above described, 111 the osition shown in Fig. l and the engine lieing started, now, at each'explosion of each .of the en ines the pressure beneath the'lower end 0 each of the plungers 7 will be" sufiicient to raise the plunger-s and to lift the sprin s 8" into contact with the lower ends cf the contact-pieces 11 thus closing the circuit through the several lamps 18 and causing the lamps to glow. If, for any reason, either of the engines should fail to explode, its plan or will fail to rise, the circult through its amp will remain open and the lamp will remain dark, thus indicating hich engine-cylinder is at fault, as illustrated in Fig. 3i'n which the left hand cylinder is operating properly while the other two cylinders do not explode, -,It will be understood that the quick succession of explosions in the cylinders which are working properly and the short intervals of open circuit will cause in the lamps a practically continuous low. r

Having described my invention, what I claim and desire tosecure by Letters Patent, 1S, I

v 1. In a de'vice of the described character, an engine having a-'plurality of explosive chambers, an' annunciator which includes for indicating visually the explosions in each of the explosion-chambers,"and means controlled by the explosions in the respective chambers for actuating the appropriate in- I dicator in the annunciator;

2. In a deviceof the described character, an engine having a plurality of explosive chambers, an electric 1am for each chamher, and means controlled v the exn the record of-the casein the Patent Office.

[sEAn] sad, the several cocks I 1911, upon the application of Rodney 0.

in the respective chambers for lighting their respective lamps. 1

3. In a device of the described character, a multiple cylinder explosive engine, a piston for the explosion chamber of each cylinder disposed in a piston chamber connected by a-suitable duct with such explosion chamber and arranged to be actuated by the ex lesion in such explosion chamber, a spring or each of said pistons, each spring being tensioned in oppos1tion to the explosion pressure, and means controlled by the movement of the respective pistons for inplos1on-chambers, for each explosion-chamher a piston disposed in a piston-chamber connected by a suitable duct with its ex 10- sion-chamber and ada ted to be actuated by the explosions in suc chamber, a cock in each of said ducts, means for manually and simultaneously actuating said cocks, for each explosion-chamber an electric lamp suitably connected with a source of electric energy,

and for each lamp amake-and-break device disposed in operative relation to its appropriate piston.

, In testimon whereof I aflix my signature in presence 0 two witnesses.

. RODNEY O. DEWEY.

Witnesses:

CLEM V. WAGNER, Ana E. CAMERON.

It is hereby certified thht'fii Letters Patent No. 989,132, granted April 11,

Dewey, of Hoytv'ille, Ohio, for an improvement in Ann't1nciators for Explosive-Engines, an error appears in the printed specification requiring correction as follows: Page 2,- line 36, after the word includes the word means should be inserted; and that the said Letters Patent should bei read with this correction therein that the same may conform to Signed and sealed this 9th day of May, A. D., 1911.

C. C. BILLINGS, Acting Commissioner of Patents. 

